Safety-bar.



L. A. BRGWN. SAFETY BAR. APPLIUATION FILED JULY 21,1913.

1 1 O4, 1 O l Patented July 21,1914. l

d Q/'f nl: Nomzls FsrERs crd., wAsmNaraN. nA cA UNITED STATES LEWIS A.BROWN',l OF HORINE, MISSOURI.

SAFETY-BAR.

Specification of Letters Patent. i Patented July 21, 11914:.

Application led July 21, 1913. Serial No. 780,156.

To all 'whom it may concern:

Be it known that I, LEWIS A. BROWN, a citizen of the United States,residing at the city of Horine, State of Missouri, haveinvented a newand vuseful v'Safety-Bar, of which the following is a specification.

This invention relates to safety bars adapted for use in Window orv dooropenings, and it consists of one or more bars of the tubular typeequipped with sound intensifying devices whereby any attempt to cut orsaw the bar will result in an audible signal, and attention therebyattracted.

An object of the invention is to provide' therein. Fig. 2 is an enlargedsectional view of one of the bars in connection with a cross barillustrating the interlaced arrangement of the elements mounted in thebars, and also illustrating the connections for holding the elements inproper position.

Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 2.

In the embodiment illustrated in Fig. 1 the vertical bars l are composedof a number of separate sections, andthe transverse bars 2 are alsocomposed of a number of separate sections. The several vertical andtransverse sections are united by suitable fittings 8, and the ends ofthe outer sections are embedded within the wall structure 4, therebypreventing removal of any parts of the several bars. Within eachvertical bar there is a number of thin metallic strips,

to a member 7 movably vsupported within the Vbar and provided with acentrally threaded hole. A bearing block 8 mounted against the end ofthe bar, supports a bolt 9 which isrevolubly mounted in a hole in saidblock 8 and which screws into the threaded hole in the member 7. The endof the bolt 9 is provided with a head 10 whereby the bolt may bemanipulated to draw the member 7 and stretch the radial plates 5. Sincethe member 6 and the bearing block 8 are against the ends of thevertical tubular bars the said member 6 and block 8 are embedded in thewall structure and are, therefore, inaccessible after the bars aremounted in position.

The transverse bars 2 are of similar construct-ion7 and contain the'radial plates 11 arranged and stretched just like the radial plates 5are arranged and stretched. Attheir points of intersection the radialplates 5 and the radial plates 11 are interlaced, so that each radialplate 5 is in cont-act with each one of the radial plates 11, and eachof the radial plates 11 is in Contact with each of the radial plates 5.Thus the vibration resulting from any eortto cut or saw any one of theradial plates will be transmitted to every other radial plate.

\ As previously explained and as illustrated in Fig. 3 'the radialplates 5 and the radial plates 1l are of thin sheet metal having theirouter edges close to but out of contact with the inner surfaces of thetubular bars. Therefore, when an attempt is made to cut or saw thetubular bars the edge of the saw or cutting implement will engage withand vibrate the radial plates, resulting in a noise which will beaudible to a person at a considerable distance from the place in whichthe bars are mounted. In Fig. 3 I have, for purposes of convenience,illustrated four radial plates within the tubular bar, but thisillustration is for purposes of convenience only and it may be foundpreferable in some instances to utilize a greater number of said platesin each tubular bar. I contemplate the employment of a greater numberwhen needed, and I do not restrict myself to any specic number nor toother specific features illustrated in the present embodiment of myinvention.

Vhat I claim and desire to secure by Letters Patent of the United Statesis:

1. A safety bar comprising a tubular bar, a plurality of radial metallicplates Within said bar, and means for stretching and holding saidplates, substantially as specified.

2. The combination with a series of intersecting tubular bars, of aseries of radial metallic plates mounted in said bars and also being inintersecting arrangement, and means for stretching and holding saidplates, substantially as specified.

3. The combination with a tubular bar, a series of radial metallicplates mounted in said bar having their outer edges close to and out ofContact With the Wall of said bar, and means for stretching and holdingsaid plates in the position and adjustment aforesaid, substantially asspecified.

t. The combination With a tubular bar, a series of radial metallicplates mounted in said bar having their outer edges close to and out-.ofcontact With the Wall of said bar, and manipulative means for stretchingand holding said plates in the posit-ion and adjustment aforesaid,substantially as specified. In Witness whereof, I have signed thisspecification in the presence ot' two subscribing Witnesses.

LEWIS A. BROWN.

VVit-nesses:

R. M. LAWRENCE., J. D. RIPPEY.

Gopes of this patent may be obtained for five cents each, by addressingthe Gommissioner of Eatents, Washington, D. 6.

